The interior concept is built around two complementary principles: making the media collection more concentrated and identifiable, and making people and their activities visible. The design uses the basic element of the library, the bookshelf, to define unique spaces for different uses. Every floor has multiple clusters of bookshelves, known as media villages, each with an individual identity and purpose: from the soft play space in a cluster of circular bookshelves on the first floor, to the cross-shaped gaming cluster for teens on the second, and to the scattered rooms for hobby activities on the third floor. These clusters are defined by red-coloured bookshelves, with more vibrant tones on the lower floors, where activities tend to be more energetic and communal, and a calmer palette on the upper floors, where activities are more private and contemplative.

In order to support the library’s diverse cultural and social functions, the design gives particular attention to providing a welcoming environment and clear orientation. On the ground floor a café invites people inside, while the building’s central atrium helps to lead them upwards, with clearly identifiable blue-coloured orientation points on each landing. A bespoke wayfinding design developed by MVRDV ensures that users can always figure out where they belong.

On the ground and upper floors, visitors can explore a wide range of media and literature, from a children’s and family library to fiction, international books, audiobooks and film. A strong emphasis is placed on collaborative experimentation and hands-on activities, with makerspaces, rehearsal rooms to practice music, and equipment such as 3D printers, VR technology and robotics. At the same time, quieter areas offer space for focused studying and individual work. Flexible spaces allow for both individual learning and collaborative, interactive workshops. On the top floor, the recently added “Stadt Raum” creates a venue for events with panoramic views across the city.